No. Could you try to put your finger on what exactly in this text gives you the vibes? Also, a sibling comment suggests that "those tiles" is some sort of slop

No. Could you try to put your finger on what exactly in this text gives you the vibes? Also, a sibling comment suggests that "those tiles" is some sort of slop; but I find it no more sloppy than "this little web app" in the preceding sentence. Both are handwavy markers of imprecision common in oral speech. A comment on English Stack Exchange points out that this feature is referred to as the "indefinite this" [0]. [0] - https://english.stackexchange.com/questions/389637/using-this-as-an-indefinite-article#comment925633_389637 https://english.stackexchange.com/questions/389637/using-thi...